Topic 6 · Alcohol, Drugs, and Driving (DUI Laws)
Which of these over-the-counter medicines can impair driving?
- Vitamin C tablets
- Strong cold medicines and antihistamines — correct answer
- Cough drops
Why
Strong cold remedies and antihistamines are common causes of drowsiness — including cough syrups, which the handbook names explicitly. (Handbook, Section 9.)
Practise this in the real format
Reading one answer is not the same as sitting the test. The simulator runs the first-time adult form: 36 questions, 6 mistakes allowed, 83% to pass.
Source: California Driver's Handbook (DL 600, rev. 6/2025), the document the DMV writes the real test from. Edited by Fernando Aguilera. Aprobify is not affiliated with the California DMV.
More from Alcohol, Drugs, and Driving (DUI Laws)
- If you’re driving a passenger for hire (like a taxi/Uber), your BAC must be below:
- The presence of which in a car can result in a citation, even if the driver is not drinking?
- If you drive erratically with a BAC below 0.08%, can you be arrested for DUI?
- Which of the following prescription drugs could impair driving?
- Which statement is correct regarding drugs and driving?
- When does impairment from alcohol often begin?